MPPT Solar Controller Solar Regulator 50A 12V 24V Auot Switch This is an intelligent and multifunctional solar charge controller, it's MPPT+PWM charging modeController Provided MPPT Maximum power point tracking Function,charging mode is PWM) MPPT technology, could increase efficiency by 10%-30% 12V/24V auto switch ,Various protections include protection for battery back discharging,protection for battery low voltage,overloading & short-circuit protection and battery reversed protection. When the battery voltage is low, the controller will automatically cut off the load from the system. If the voltage of battery is back to normal and the load will restart working. The controller will automatically compensate the temperature of the charging voltage according to the changes of ambient temperature.